Headset



FIG. 1 is a perspective view of a headset showing my design;

FIG. 2 is a bottom view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a left side thereof;

FIG. 6 is a rear view thereof; and,

FIG. 7 is a top view thereof. 

The ornamental design for a headset, as shown and described. 